RCC Structures Design
The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than

24 bar diameters
18 bar diameters
30 bar diameters
36 bar diameters

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RCC Structures Design
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

24 diameters from the centre of the column
42 diameters from the inner edge of the column
42 diameters from the outer edge of the column
42 diameters from the centre of the column

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